Means for protecting reciprocating tables of matrix-making machines



E. J. MOHAN Aug. 21, 1934.

MEANS FOR PROTECTING RECIPROCATING TABLES OF MATRIX MAKING MACHINES Filed Dec s mw w FlL INVENTOR.

Patented Aug. 21, 1934 OFFICE 1,971,116 MEANS FOR PROTECTING RECIPROCATING TABLES OF MATRIX JCHINES MAKING MA- Edward J. Mohan, Forest Hills, N. Y., assignor to R. Hoe & 00., 1110., New York, N. Y., a corporation of New York; Irving .Irust Company, re

ceiver Application December 21, 1931," Serial No. 582,209

2 Claims.

injury to the latter.

Another object is to provide a' guard or bumper plate which can be quickly attached to conventional matrix-making machinery with a view to preventing injury to the comparatively expensive bed plate thereof, generally incurred infconnection with the use of coacting form-transporting tables which convey the forms or chases in which the types are locked to the matrix-making machinery.

A further object is the provision of renewable means or an attachment for preventing wear and damage to the reciprocating table of a matrixmaking machine during normal use thereof, either by the transfer of the forms from a fixed support to the said table, or by contact with a form-transporting table from which the chases or forms are also transferred to the reciprocating table.

It is also an object of the invention to provide a device of the kind indicated that will be of generally improved construction, whereby it will be simple, durable and inexpensive in structure, as well as convenient, practical, serviceable and efficient in its use. With the foregoing and other objects in view, which will appear as the description proceeds, the

invention resides in the combination and arrangement of parts, and in the details of construction hereinafter described and claimed, it being understood that various changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

, The preferred embodiment of the invention is '5 illustrated in the accompanying drawing, wherein:

Figure 1 is a fragmentary side elevational View of a matrix-making machine to which an embodiment of the invention has been operatively applied; and

Figure 2 is a fragmentary end view of the same machine looking in the direction of the arrow 2 of Figure 1, the guard plate forming the subject matter of the present invention being shown in side elevation.

In the drawing which includes only such parts of a matrix-making machine as are essential to a proper understanding of the invention, A designates a matrix-making roller or machine comprising the usual side frames or members 11 shown fragmentarily, on which is slidably mounted in any suitable manner as by the carriagebrackets or rails 12,'fastened to the side frames 11, a reciprocating bed plate or table 13, having racks 14, meshing with gears 15, secured on opposite ends of a driving roll 16, which is adapted to be normally engaged against the underneath surface of the bed plate 13. The roll 16 is secured to or formed with a shaft 17, which is journaled in the side frames ll and provided at one end 18, with a gear 19 keyed thereto, the gear 19, which is' connected to a source of power (not shown), meshing with a gear 21, keyed to a shaft 22 also journaled in the side frames 11 and fastened to a pressure roll 23. On the reciprocating bed plate 13, which is core-d to provide-the longitudinally extending holes 24 shown in dotted lines on Figure 2, the customary type forms or printing surfaces 25 are placed, upon which a fiong or piece of prepared paper 26 is arranged, preparatory to the making of a matrix therefrom. One or more blankets 27 are generally laid on the flong 26 to cushion the pressure applied and as a protection to the flong from direct contact with the roll 23. The above described details form no part of the present invention, being component parts of well known mechanism.

My invention comprises an oblong guard or bumper plate 28 formed of any suitable material, or preferably hardened metal such as steel. A pair of the guard plates 28 are secured at opposite ends of the reciprocating table 13 by screws 29 which are passed through holes in the plates 28 and threadedly engaged in holes 31, formed in the said opposite ends. As best shown in Figure 2, the guard or bumper plates 28 are formed at their ends with projecting ears or extensions 32 which are engaged on the rails 12. By further inspection of Figure 2, it will be seen the opposite ends of the guard plate 28 which may be of the same configuration as the ends of the 100 reciprocating table 13 to which they are attached, are shouldered as at 33 to provide clearance for the racks 14 and their coacting gears 15. When desired or necessary the guard plate 28 may be detached by removing screws 29, and then re- 105 turned to position, or another similar guard plate substituted therefor.

As is customary, the, form-transporting tables which convey the forms or chases in which the types are locked, are constructed or made adjustable so that their tops or upper surfaces are substantially on a level with that of the reciprocating bed plate 13 in order that the transfer of the said chases from the form carrying tables may be conveniently made to the bed plate. In some instances, fixed supports or shelves are employed for the forms which are conveyed or slid therefrom to the bed plates.

In practice it has been found that the recip rocating bed plates or tables of matrix-making machines are frequently damaged'by contact with the tops of form or chase-transporting tables or members, one of which is shown fragmentarily at 34, since the latter, during the hurry occurring in modern newspaper plants. are often roughly impelled against the said bed plate 13, thereby denting, nicking and otherwise damaging same, and in time requiring the replacement of the said expensive bed plate by a new one.

The reciprocating bed plates or tables 13, also in normal use are subjected to considerable wear, particularly at the ends, by the transfer or sliding of the forms in which the types are locked from the transporting tables to the bed plates or from fixed supports or shelves to the said bed plates, it being understood that the member 34, shown fragmentarily, may represent either a movable table or a fixed support and the like. The guard plates forming the subject matter of the present invention are preferably case-hardened or formed of metal considerably harder than the bed plates 13, and thus better adapted to resist wear than the latter.

With the present invention, it will be seen that it is only necessary to renew my attachment or guard plate 28, which is of simple and inexpensive construction, and which may be shaped similar to the ends of the reciprocating table 13 to which it is secured, when this is desirable. In all cases it will be noted that practically any type of a reciprocating bed plate or table of a matrix-making machine may be equipped with the present guard plate by merely providing threaded holes in the former and then afiixing my plate thereto. In addition to the above advantages, it will also be noted that the holes 24, cored out of the table 13, will be closed by the guard plate 28.

I am aware that the invention may be embodied 'in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

What I claim is:

1. In a matrix making machine including a reciprocating table and a cooperating pressure roller, the table being formed of metal of given hardness and having core holes extending longitudinally therethrough, guard plates formed of metal harder than the table and secured to the opposed ends thereof, the guard plates being constructed and arranged to protect the ends of'the table and terminal walls of the core holes and to form a closure for the core holes.

2. In a matrix making machine including a EDWARD MOI-IAN. 

